Electronic pest control is the name given to several types of electrically powered devices designed to repel pests, such as insects. Ultrasonic devices have shown promise in repelling insect pest species. They emit short wavelength, high-frequency sound waves that can be detected by insects but are too high-pitched to be detected by humans. The following table shows the maximum end of the hearing range of frequencies detectable by various organisms (Table 1). To investigate the effectiveness of ultrasonic devices in dispersing pest insects, scientists collected data from two different regions. Region 1: a rural crop-growing region where insecticides are applied for crop protection Region 2: a protected nature reserve that is managed for conservation and research Scientists measured the population density of insects in both regions before and after activating two different kinds of ultrasonic devices. The first ultrasonic device emitted sound at a frequency of 40 kHz and the second ultrasonic device emitted sound at a frequency of 48 kHz. The average population density of various pest species when exposed to the device that emitted sound at a frequency of 40 kHz is depicted in Table 2. The average population density of various pest species when exposed to the device that emitted sound at a frequency of 48 kHz is depicted in Table 3. Construct a graph using data in the table to represent the effect of the ultrasonic device that emitted sound at 40 kHz on both grasshoppers and mosquitoes in region 2.
Anatomy and Physiology of Special Sensory Organs
Sensory organs can be labeled as special sensory structures that permit sight, hearing, odor, and flavor. Sensory structures permitting proprioception, touch, thermal, and pain perception can be classified as more advanced sensory organs. The sensory neurons are trained to find out modifications in the external and internal conditions so that a person's body can react to that change. A stimulus is the first signal that is recognized by any sensory receptor of the body. Stimulus is an impulse generated when there is a change in the surroundings of a person. For example, a heated environment will alert the brain through the thermal sensory organs and generate a reflex accordingly.
Sensory Receptors
The human sensory system is one of the most complex and highly evolved structures, which processes a myriad of incoming messages. This well-coordinated system helps an organism or individual to respond to external stimuli, appropriately. The sensory receptors are an important part of the sensory system. These receptors are specialized epidermal cells that respond to external environmental stimuli. These receptors consist of structural and support cells that form the peripheral unit of the receptor and the neural dendrites which receive and detect the external stimuli.
Electronic pest control is the name given to several types of electrically powered devices
designed to repel pests, such as insects. Ultrasonic devices have shown promise in repelling
insect pest species. They emit short wavelength, high-frequency sound waves that can be
detected by insects but are too high-pitched to be detected by humans. The following table shows
the maximum end of the hearing range of frequencies detectable by various organisms (Table 1).
To investigate the effectiveness of ultrasonic devices in dispersing pest insects, scientists
collected data from two different regions.
Region 1: a rural crop-growing region where insecticides are applied for crop protection
Region 2: a protected nature reserve that is managed for conservation and research
Scientists measured the population density of insects in both regions before and after activating
two different kinds of ultrasonic devices. The first ultrasonic device emitted sound at a frequency
of 40 kHz and the second ultrasonic device emitted sound at a frequency of 48 kHz. The average
population density of various pest species when exposed to the device that emitted sound at a
frequency of 40 kHz is depicted in Table 2. The average population density of various pest
species when exposed to the device that emitted sound at a frequency of 48 kHz is depicted in
Table 3.
Construct a graph using data in the table to represent the effect of the ultrasonic device that
emitted sound at 40 kHz on both grasshoppers and mosquitoes in region 2.
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